Reviewed-by: Jiaxin Wu <jiaxin...@intel.com>
> -----Original Message-----
> From: Ni, Ray <ray...@intel.com>
> Sent: Wednesday, May 31, 2023 7:35 PM
> To: devel@edk2.groups.io
> Cc: Wu, Jiaxin <jiaxin...@intel.com>; Bi, Dandan <dandan...@intel.com>;
> Gao, Liming <gaolim...@byosoft.com.cn>; Wang, Jian J
> <jian.j.w...@intel.com>
> Subject: [PATCH V2 6/6] MdeModulePkg/SmmCorePerformanceLib: Disable
> perf-logging at runtime
>
> Because SMM perf-logging is migrated to non-SMRAM at ReadyToBoot
> by DxeCorePerformanceLib, the perf-logging after ExitBS is useless and
> impact the SMI latency at runtime.
> Hence the SmmCorePerformanceLib is updated to disable perf-logging
> after ExitBS.
>
> Cc: Jiaxin Wu <jiaxin...@intel.com>
> Cc: Dandan Bi <dandan...@intel.com>
> Cc: Liming Gao <gaolim...@byosoft.com.cn>
> Cc: Jian J Wang <jian.j.w...@intel.com>
> ---
> .../SmmCorePerformanceLib.c | 48 ++++++++++++++++++-
> .../SmmCorePerformanceLib.inf | 3 +-
> 2 files changed, 48 insertions(+), 3 deletions(-)
>
> diff --git
> a/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformance
> Lib.c
> b/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformance
> Lib.c
> index 3efe56e056..c566a298dd 100644
> ---
> a/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformance
> Lib.c
> +++
> b/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformance
> Lib.c
> @@ -16,7 +16,7 @@
>
>
> SmmPerformanceHandlerEx(), SmmPerformanceHandler() will receive
> untrusted input and do basic validation.
>
>
>
> -Copyright (c) 2011 - 2021, Intel Corporation. All rights reserved.<BR>
>
> +Copyright (c) 2011 - 2023, Intel Corporation. All rights reserved.<BR>
>
> SPDX-License-Identifier: BSD-2-Clause-Patent
>
>
>
> **/
>
> @@ -48,6 +48,7 @@ SPIN_LOCK mSmmFpdtLock;
> PERFORMANCE_PROPERTY mPerformanceProperty;
>
> UINT32 mCachedLength = 0;
>
> UINT32 mBootRecordSize = 0;
>
> +BOOLEAN mPerformanceMeasurementEnabled;
>
>
>
> //
>
> // Interfaces for SMM PerformanceMeasurement Protocol.
>
> @@ -929,6 +930,36 @@ FpdtSmiHandler (
> return EFI_SUCCESS;
>
> }
>
>
>
> +/**
>
> + This is the Event call back function is triggered in SMM to notify the
> Library
>
> + the system is entering runtime phase.
>
> +
>
> + @param[in] Protocol Points to the protocol's unique identifier
>
> + @param[in] Interface Points to the interface instance
>
> + @param[in] Handle The handle on which the interface was installed
>
> +
>
> + @retval EFI_SUCCESS SmmAtRuntimeCallBack runs successfully
>
> + **/
>
> +EFI_STATUS
>
> +EFIAPI
>
> +SmmCorePerformanceLibExitBootServicesCallback (
>
> + IN CONST EFI_GUID *Protocol,
>
> + IN VOID *Interface,
>
> + IN EFI_HANDLE Handle
>
> + )
>
> +{
>
> + //
>
> + // Disable performance measurement after ExitBootServices because
>
> + // 1. Performance measurement might impact SMI latency at runtime;
>
> + // 2. Performance log is copied to non SMRAM at ReadyToBoot so runtime
> performance
>
> + // log is not useful.
>
> + //
>
> + mPerformanceMeasurementEnabled = FALSE;
>
> +
>
> + return EFI_SUCCESS;
>
> +}
>
> +
>
> +
>
> /**
>
> SmmBase2 protocol notify callback function, when SMST and SMM memory
> service get initialized
>
> this function is callbacked to initialize the Smm Performance Lib
>
> @@ -948,6 +979,7 @@ InitializeSmmCorePerformanceLib (
> EFI_HANDLE SmiHandle;
>
> EFI_STATUS Status;
>
> PERFORMANCE_PROPERTY *PerformanceProperty;
>
> + VOID *Registration;
>
>
>
> //
>
> // Initialize spin lock
>
> @@ -987,6 +1019,16 @@ InitializeSmmCorePerformanceLib (
> Status = gBS->InstallConfigurationTable (&gPerformanceProtocolGuid,
> &mPerformanceProperty);
>
> ASSERT_EFI_ERROR (Status);
>
> }
>
> +
>
> + //
>
> + // Register callback function for ExitBootServices event.
>
> + //
>
> + Status = gSmst->SmmRegisterProtocolNotify (
>
> + &gEdkiiSmmExitBootServicesProtocolGuid,
>
> + SmmCorePerformanceLibExitBootServicesCallback,
>
> + &Registration
>
> + );
>
> + ASSERT_EFI_ERROR (Status);
>
> }
>
>
>
> /**
>
> @@ -1011,6 +1053,8 @@ SmmCorePerformanceLibConstructor (
> EFI_EVENT Event;
>
> VOID *Registration;
>
>
>
> + mPerformanceMeasurementEnabled = (BOOLEAN)((PcdGet8
> (PcdPerformanceLibraryPropertyMask) &
> PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED) != 0);
>
> +
>
> if (!PerformanceMeasurementEnabled ()) {
>
> //
>
> // Do not initialize performance infrastructure if not required.
>
> @@ -1383,7 +1427,7 @@ PerformanceMeasurementEnabled (
> VOID
>
> )
>
> {
>
> - return (BOOLEAN)((PcdGet8 (PcdPerformanceLibraryPropertyMask) &
> PERFORMANCE_LIBRARY_PROPERTY_MEASUREMENT_ENABLED) != 0);
>
> + return mPerformanceMeasurementEnabled;
>
> }
>
>
>
> /**
>
> diff --git
> a/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformance
> Lib.inf
> b/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformance
> Lib.inf
> index 9eecc4b58c..9a7e14e80c 100644
> ---
> a/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformance
> Lib.inf
> +++
> b/MdeModulePkg/Library/SmmCorePerformanceLib/SmmCorePerformance
> Lib.inf
> @@ -8,7 +8,7 @@
> # This library is mainly used by SMM Core to start performance logging to
> ensure that
>
> # SMM Performance and PerformanceEx Protocol are installed at the very
> beginning of SMM phase.
>
> #
>
> -# Copyright (c) 2011 - 2021, Intel Corporation. All rights reserved.<BR>
>
> +# Copyright (c) 2011 - 2023, Intel Corporation. All rights reserved.<BR>
>
> # SPDX-License-Identifier: BSD-2-Clause-Patent
>
> #
>
> ##
>
> @@ -58,6 +58,7 @@
>
>
> [Protocols]
>
> gEfiSmmBase2ProtocolGuid ## CONSUMES
>
> + gEdkiiSmmExitBootServicesProtocolGuid ## CONSUMES
>
>
>
> [Guids]
>
> ## PRODUCES ## SystemTable
>
> --
> 2.39.1.windows.1
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